import cn.hutool.core.date.DateUtil;
Map<String, Object> map = new HashMap<>(); map.put("user.name", "Alice"); map.put("user.age", 30); hutool 39 new
Another thought: Hutool often adds more stream-like APIs, simplifying collections. Maybe 3.9 introduced more functional programming features. Or maybe a new Date/Time tool that's more robust. Also, perhaps better support for Java 17 features if the version aligns with that. import cn
This is a hypothetical example if they added a parseIso8601 method. map = new HashMap<